[PATCH 23/24] ARM: dts: zte: Add ZX279128S SoC description

[Navid Ghahremani <ghahramani.navid@gmail.com>]

Describe the CPUs, SRAM, timers, interrupt controller, cache, clocks,
pin mux and peripheral controllers.

Assisted-by: LLM
Signed-off-by: Navid Ghahremani <ghahramani.navid@gmail.com>
---
 arch/arm/boot/dts/zte/zx279128s.dtsi | 397 +++++++++++++++++++++++++++
 1 file changed, 397 insertions(+)
 create mode 100644 arch/arm/boot/dts/zte/zx279128s.dtsi

diff --git a/arch/arm/boot/dts/zte/zx279128s.dtsi b/arch/arm/boot/dts/zte/zx279128s.dtsi
new file mode 100644
index 0000000000..e2bbc70de3
--- /dev/null
+++ b/arch/arm/boot/dts/zte/zx279128s.dtsi
@@ -0,0 +1,397 @@
+// SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+/*
+ * ZTE zx279128s SoC: dual Cortex-A9 with an L2C-310 cache controller, a
+ * five-port gigabit switch, two PCIe controllers and a SPI NAND controller.
+ *
+ * Copyright (C) 2026 Navid Ghahremani <ghahramani.navid@gmail.com>
+ */
+
+#include <dt-bindings/clock/zte,zx279128s-crm.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	compatible = "zte,zx279128s";
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		enable-method = "zte,zx279128s-smp";
+
+		cpu@0 {
+			compatible = "arm,cortex-a9";
+			device_type = "cpu";
+			next-level-cache = <&l2cc>;
+			reg = <0>;
+		};
+
+		cpu@1 {
+			compatible = "arm,cortex-a9";
+			device_type = "cpu";
+			next-level-cache = <&l2cc>;
+			reg = <1>;
+		};
+	};
+
+	osc: clock-25000000 {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <25000000>;
+	};
+
+	/* The boot loader's "reset" command writes 1 to CRM 1 + 0x44 */
+	reboot {
+		compatible = "syscon-reboot";
+		regmap = <&topcrm>;
+		offset = <0x44>;
+		mask = <0x1>;
+		value = <0x1>;
+	};
+
+	soc {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "simple-bus";
+		interrupt-parent = <&gic>;
+		ranges;
+
+		sram@200800 {
+			compatible = "mmio-sram";
+			reg = <0x00200800 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0x00200800 0x1000>;
+
+			/* the parked second core jumps here on every wake-up */
+			smp-sram@0 {
+				compatible = "zte,zx279128s-smp-sram";
+				reg = <0x0 0x8>;
+			};
+		};
+
+		scu@800000 {
+			compatible = "arm,cortex-a9-scu";
+			reg = <0x00800000 0x100>;
+		};
+
+		timer@800200 {
+			compatible = "arm,cortex-a9-global-timer";
+			reg = <0x00800200 0x20>;
+			interrupts = <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_EDGE_RISING)>;
+			clocks = <&topcrm ZX279128S_TOP_A9_PERIPH>;
+		};
+
+		timer@800600 {
+			compatible = "arm,cortex-a9-twd-timer";
+			reg = <0x00800600 0x20>;
+			interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_EDGE_RISING)>;
+			clocks = <&topcrm ZX279128S_TOP_A9_PERIPH>;
+		};
+
+		watchdog@800620 {
+			compatible = "arm,cortex-a9-twd-wdt";
+			reg = <0x00800620 0x20>;
+			interrupts = <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(1) | IRQ_TYPE_LEVEL_HIGH)>;
+			clocks = <&topcrm ZX279128S_TOP_A9_PERIPH>;
+			status = "disabled";
+		};
+
+		gic: interrupt-controller@801000 {
+			compatible = "arm,cortex-a9-gic";
+			#address-cells = <0>;
+			#interrupt-cells = <3>;
+			interrupt-controller;
+			reg = <0x00801000 0x1000>,
+			      <0x00800100 0x0100>;
+		};
+
+		l2cc: cache-controller@c00000 {
+			compatible = "arm,pl310-cache";
+			reg = <0x00c00000 0x1000>;
+			cache-unified;
+			cache-level = <2>;
+			arm,data-latency = <2 2 2>;
+			arm,tag-latency = <2 2 2>;
+			/*
+			 * As the stock firmware (AUX_CTRL 0x76430001). Without
+			 * shared-override the PL310 turns normal non-cacheable
+			 * shared accesses (dma_alloc_coherent buffers) into
+			 * cacheable ones, so devices and CPUs see stale data.
+			 */
+			arm,shared-override;
+			prefetch-data = <1>;
+			prefetch-instr = <1>;
+			arm,double-linefill = <1>;
+			arm,double-linefill-incr = <0>;
+			/*
+			 * A PCIe read that is still outstanding while an L2
+			 * maintenance or sync operation runs hangs this SoC.
+			 */
+			zte,l2c-io-read-lock;
+		};
+
+		usb: usb@9100000 {
+			compatible = "zte,zx279128s-dwc3";
+			reg = <0x09100000 0x100000>;
+			interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&topcrm ZX279128S_TOP_USB_REF>,
+				 <&topcrm ZX279128S_TOP_USB_ACLK>,
+				 <&topcrm ZX279128S_TOP_USB_SUSPEND>;
+			clock-names = "ref", "bus_early", "suspend";
+			/* in the order the vendor firmware releases them */
+			resets = <&topcrm ZX279128S_TOP_RST_USB_B11>,
+				 <&topcrm ZX279128S_TOP_RST_USB_B14>,
+				 <&topcrm ZX279128S_TOP_RST_USB_B9>,
+				 <&topcrm ZX279128S_TOP_RST_USB_B10>;
+			dr_mode = "host";
+			/* the 20 MHz reference clock */
+			snps,ref-clock-period-ns = <50>;
+			status = "disabled";
+		};
+
+		pcie0: pcie@f000000 {
+			compatible = "zte,zx279128s-pcie";
+			reg = <0x0f000000 0x4000>,
+			      <0x09500000 0x1000>,
+			      <0x1c000000 0x200000>;
+			reg-names = "dbi", "ctrl", "config";
+			#address-cells = <3>;
+			#size-cells = <2>;
+			device_type = "pci";
+			bus-range = <0x00 0xff>;
+			ranges = <0x82000000 0 0x10000000 0x10000000 0 0x08000000>;
+			dma-ranges = <0x43000000 0 0x40000000 0x40000000 0 0x20000000>;
+			interrupts = <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>;
+			#interrupt-cells = <1>;
+			interrupt-map-mask = <0 0 0 7>;
+			interrupt-map = <0 0 0 1 &gic GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 2 &gic GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 3 &gic GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 4 &gic GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>;
+			linux,pci-domain = <0>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pcie0_pins>;
+			zte,crm = <&topcrm>, <&crm2>;
+			status = "disabled";
+		};
+
+		pcie1: pcie@f100000 {
+			compatible = "zte,zx279128s-pcie";
+			reg = <0x0f100000 0x4000>,
+			      <0x09600000 0x1000>,
+			      <0x2c000000 0x200000>;
+			reg-names = "dbi", "ctrl", "config";
+			#address-cells = <3>;
+			#size-cells = <2>;
+			device_type = "pci";
+			bus-range = <0x00 0xff>;
+			ranges = <0x82000000 0 0x20000000 0x20000000 0 0x08000000>;
+			dma-ranges = <0x43000000 0 0x40000000 0x40000000 0 0x20000000>;
+			interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+			#interrupt-cells = <1>;
+			interrupt-map-mask = <0 0 0 7>;
+			interrupt-map = <0 0 0 1 &gic GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 2 &gic GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 3 &gic GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 4 &gic GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+			linux,pci-domain = <1>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pcie1_pins>;
+			zte,crm = <&topcrm>, <&crm2>;
+			status = "disabled";
+		};
+
+		gmac: ethernet@92000000 {
+			compatible = "zte,zx279128s-gmac";
+			reg = <0x92000000 0x400000>;
+			interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>;
+			status = "disabled";
+
+			ethernet-ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				gmac_port0: port@0 {
+					reg = <0>;
+					status = "disabled";
+				};
+
+				gmac_port1: port@1 {
+					reg = <1>;
+					status = "disabled";
+				};
+
+				gmac_port2: port@2 {
+					reg = <2>;
+					status = "disabled";
+				};
+
+				gmac_port3: port@3 {
+					reg = <3>;
+					status = "disabled";
+				};
+
+				gmac_port4: port@4 {
+					reg = <4>;
+					status = "disabled";
+				};
+			};
+		};
+
+		topcrm: clock-controller@94000000 {
+			compatible = "zte,zx279128s-topcrm", "syscon";
+			reg = <0x94000000 0x1000>;
+			clocks = <&osc>;
+			clock-names = "osc";
+			#clock-cells = <1>;
+			#reset-cells = <1>;
+		};
+
+		crm2: syscon@94100000 {
+			compatible = "zte,zx279128s-crm2", "syscon";
+			reg = <0x94100000 0x1000>;
+		};
+
+		/*
+		 * The pin mux. What most of its bits select isn't known, so each
+		 * bit is a pin of its own.
+		 */
+		pinmux: pinctrl@94200000 {
+			compatible = "zte,zx279128s-pinmux", "pinctrl-single";
+			reg = <0x94200000 0x10>;
+			#pinctrl-cells = <2>;
+			pinctrl-single,bit-per-mux;
+			pinctrl-single,register-width = <32>;
+			pinctrl-single,function-mask = <0x1>;
+
+			/* the interface to an external Ethernet PHY */
+			ext_phy_pins: ext-phy-pins {
+				pinctrl-single,bits = <0x0c 0x0 0x00180800>;
+			};
+
+			pcie0_pins: pcie0-pins {
+				pinctrl-single,bits = <0x0c 0x0 0x00004000>;
+			};
+
+			pcie1_pins: pcie1-pins {
+				pinctrl-single,bits = <0x0c 0x0 0x00000002>;
+			};
+		};
+
+		lsp0crpm: clock-controller@94400000 {
+			compatible = "zte,zx279128s-lsp0crpm";
+			reg = <0x94400000 0x1000>;
+			clocks = <&topcrm ZX279128S_TOP_LSP0_PCLK>,
+				 <&topcrm ZX279128S_TOP_LSP0_25M>,
+				 <&topcrm ZX279128S_TOP_LSP0_32K>,
+				 <&topcrm ZX279128S_TOP_LSP0_100M>;
+			clock-names = "pclk", "wclk25m", "wclk32k", "wclk100m";
+			#clock-cells = <1>;
+		};
+
+		serial0: serial@94404000 {
+			compatible = "arm,pl011", "arm,primecell";
+			arm,primecell-periphid = <0x0018c011>;
+			reg = <0x94404000 0x1000>;
+			interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&lsp0crpm ZX279128S_LSP0_UART0_WCLK>,
+				 <&lsp0crpm ZX279128S_LSP0_UART0_PCLK>;
+			clock-names = "uartclk", "apb_pclk";
+			status = "disabled";
+		};
+
+		serial1: serial@94405000 {
+			compatible = "arm,pl011", "arm,primecell";
+			arm,primecell-periphid = <0x0018c011>;
+			reg = <0x94405000 0x1000>;
+			interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&lsp0crpm ZX279128S_LSP0_UART1_WCLK>,
+				 <&lsp0crpm ZX279128S_LSP0_UART1_PCLK>;
+			clock-names = "uartclk", "apb_pclk";
+			status = "disabled";
+		};
+
+		spifc: spi@94406000 {
+			compatible = "zte,zx279128s-spifc";
+			reg = <0x94406000 0x1000>;
+			clocks = <&lsp0crpm ZX279128S_LSP0_SPI_WCLK>,
+				 <&lsp0crpm ZX279128S_LSP0_SPI_PCLK>;
+			clock-names = "wclk", "pclk";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+
+		gpio0: gpio@94407000 {
+			compatible = "zte,zx279128s-gpio";
+			reg = <0x94407000 0x40>;
+			clocks = <&lsp0crpm ZX279128S_LSP0_GPIO_PCLK>;
+			gpio-controller;
+			#gpio-cells = <2>;
+		};
+
+		gpio1: gpio@94407040 {
+			compatible = "zte,zx279128s-gpio";
+			reg = <0x94407040 0x40>;
+			clocks = <&lsp0crpm ZX279128S_LSP0_GPIO_PCLK>;
+			gpio-controller;
+			#gpio-cells = <2>;
+		};
+
+		gpio2: gpio@94407080 {
+			compatible = "zte,zx279128s-gpio";
+			reg = <0x94407080 0x40>;
+			clocks = <&lsp0crpm ZX279128S_LSP0_GPIO_PCLK>;
+			gpio-controller;
+			#gpio-cells = <2>;
+		};
+
+		gpio3: gpio@944070c0 {
+			compatible = "zte,zx279128s-gpio";
+			reg = <0x944070c0 0x40>;
+			clocks = <&lsp0crpm ZX279128S_LSP0_GPIO_PCLK>;
+			gpio-controller;
+			#gpio-cells = <2>;
+		};
+
+		gpio4: gpio@94407100 {
+			compatible = "zte,zx279128s-gpio";
+			reg = <0x94407100 0x40>;
+			clocks = <&lsp0crpm ZX279128S_LSP0_GPIO_PCLK>;
+			gpio-controller;
+			#gpio-cells = <2>;
+		};
+
+		gpio5: gpio@94407140 {
+			compatible = "zte,zx279128s-gpio";
+			reg = <0x94407140 0x40>;
+			clocks = <&lsp0crpm ZX279128S_LSP0_GPIO_PCLK>;
+			gpio-controller;
+			#gpio-cells = <2>;
+		};
+
+		lsp1crpm: clock-controller@9a100000 {
+			compatible = "zte,zx279128s-lsp1crpm";
+			reg = <0x9a100000 0x1000>;
+			clocks = <&topcrm ZX279128S_TOP_LSP1_PCLK>,
+				 <&topcrm ZX279128S_TOP_LSP1_ACLK>,
+				 <&topcrm ZX279128S_TOP_LSP1_25M>,
+				 <&topcrm ZX279128S_TOP_LSP1_49M>,
+				 <&topcrm ZX279128S_TOP_LSP1_100M>;
+			clock-names = "pclk", "aclk", "wclk25m", "wclk49m", "wclk100m";
+			#clock-cells = <1>;
+		};
+
+		mdio: mdio@9a101000 {
+			compatible = "zte,zx279128s-mdio";
+			reg = <0x9a101000 0x18>;
+			clocks = <&lsp1crpm ZX279128S_LSP1_MDIO_WCLK>,
+				 <&lsp1crpm ZX279128S_LSP1_MDIO_PCLK>;
+			clock-names = "wclk", "pclk";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+	};
+};
-- 
2.55.0